Validate Integers
Let's learn how to validate integers.
Use the filter_Var() built-in function.
And use the constant FILTER_VALIDATE_INT as argument.
How to validate integers using filter_Var()
filter_Var(integer,FILTER_VALIDATE_INT);
The first argument is an integer and the second uses the constant FILTER_VALIDATE_INT.
As shown in the example, you can change the purpose according to the value of a constant.
Returns true if the integer is valid and false.
The following example validates an integer.
<?php $int = 1000; $checkInt = filter_Var($int, FILTER_VALIDATE_INT); if($checkInt == true) { echo "This is Integer"; } else { echo "This is not Integer"; } ?>
Result
This time, let's test it by entering the wrong integer.
<?php $int = 1000.1; $checkInt = filter_Var($int, FILTER_VALIDATE_INT); if($checkInt == true) { echo "This is Integer"; } else { echo "This is not Integer"; } ?>
Result